Plasma-heteroatom-doped Ni-V-Fe trimetallic phospho-nitride as high-performance bifunctional electrocatalyst
Author(s)
Fan, Huafeng
Chen, Wei
Chen, Guangliang
Huang, Jun
Song, Changsheng
Du, Yun
Li, Chaorong
Ostrikov, Kostya Ken
Griffith University Author(s)
Year published
2020
Metadata
Show full item recordAbstract
Bi-functional electrocatalysts capable to simultaneously sustain hydrogen and oxygen evolution reactions (HER, OER) under industry-relevant conditions of hydrogen production by water electrolysis are highly desired. Here, we implement a new concept of plasma-enabled simultaneous N-P heteroatom doping to achieve the highly-competitive activity and stability of trimetallic Ni-V-Fe bi-functional electrocatalysts on a NiFe foam (N-NiVFeP/NFF), evidenced by the lower overpotentials for HER (79 mV) and OER (229 mV) to deliver a current density of 10 mA cm−2 (j10) in the 1.0 M KOH electrolyte. Meanwhile, the N-NiVFeP/NFF exhibits ...
View more >Bi-functional electrocatalysts capable to simultaneously sustain hydrogen and oxygen evolution reactions (HER, OER) under industry-relevant conditions of hydrogen production by water electrolysis are highly desired. Here, we implement a new concept of plasma-enabled simultaneous N-P heteroatom doping to achieve the highly-competitive activity and stability of trimetallic Ni-V-Fe bi-functional electrocatalysts on a NiFe foam (N-NiVFeP/NFF), evidenced by the lower overpotentials for HER (79 mV) and OER (229 mV) to deliver a current density of 10 mA cm−2 (j10) in the 1.0 M KOH electrolyte. Meanwhile, the N-NiVFeP/NFF exhibits ultra-stable performances with a current density from 10 to 100 mA cm-2 for over 100 h. Specifically, the HER and OER performances are near to those of noble-metal based electrocatalysts in the high current density region (> j200), attributing to the rich active sites exposed on the formed heterointerfaces among Ni-V-Fe phospho-nitrides, the changed electronic structure, and increased conductivity with nitrogen doping.
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View more >Bi-functional electrocatalysts capable to simultaneously sustain hydrogen and oxygen evolution reactions (HER, OER) under industry-relevant conditions of hydrogen production by water electrolysis are highly desired. Here, we implement a new concept of plasma-enabled simultaneous N-P heteroatom doping to achieve the highly-competitive activity and stability of trimetallic Ni-V-Fe bi-functional electrocatalysts on a NiFe foam (N-NiVFeP/NFF), evidenced by the lower overpotentials for HER (79 mV) and OER (229 mV) to deliver a current density of 10 mA cm−2 (j10) in the 1.0 M KOH electrolyte. Meanwhile, the N-NiVFeP/NFF exhibits ultra-stable performances with a current density from 10 to 100 mA cm-2 for over 100 h. Specifically, the HER and OER performances are near to those of noble-metal based electrocatalysts in the high current density region (> j200), attributing to the rich active sites exposed on the formed heterointerfaces among Ni-V-Fe phospho-nitrides, the changed electronic structure, and increased conductivity with nitrogen doping.
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Journal Title
Applied Catalysis B: Environmental
Volume
268
Subject
Physical chemistry
Chemical engineering
Environmental engineering
Science & Technology
Physical Sciences
Chemistry, Physical